We look at the division of 45999921 by 377 
We want to divide 45999921 by 377.

Advancing to step 1:
377 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 377

Advancing to step 2:
If we divide 45 by 377, we get 0 and a remainder of 45.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 45 leaves us with 45.
Fetch the next digit (9) from the dividend, attach it to 45 and continue: 459 / 377

Moving on to step 3:
The number 377 fits into 459 1 times, leaving a remainder of 82.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 377 from 459 to get 82.
Bring next digit (9) of the dividend behind the 82 and repeat the process: 829 / 377

Step 4:
377 goes into 829 2 times with a remainder of 75.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 754 from 829 and we're left with 75.
Fetch the next digit (9) from the dividend, attach it to 75 and continue: 759 / 377

Moving on to step 5:
759 divided by 377 is 2 with a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 122.0
Subtracting 754 from 759 leaves us with 5.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 377

Going ahead to step 6:
377 goes into 59 0 times with a remainder of 59.
Write down 0 as next digit of the result. 
Result so far: 1220.0
If we subtract 0 from 59, we get 59.
Fetch the next digit (2) from the dividend, attach it to 59 and continue: 592 / 377

Let's proceed to step 7:
The number 377 fits into 592 1 times, leaving a remainder of 215.
Put 1 as the next digit of the answer. 
Result so far: 12201.0
Subtract 377 from 592 to get 215.
Take the next digit (1) from the dividend and append it to 215, then repeat: 2151 / 377

Step 8:
2151 divided by 377 is 5 with a remainder of 266.
Put 5 as the next digit of the answer. 
Result so far: 122015.0
If we take 1885 away from 2151, we end up with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Advancing to step 9:
377 goes into 2660 7 times with a remainder of 21.
The number 7 becomes the next digit in our result. 
Result so far: 122015.7
Subtracting 2639 from 2660 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 10:
When dividing 210 by 377, we get 0 with a remainder of 210.
The next digit of our result is 0. 
Result so far: 122015.7
If we subtract 0 from 210, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 11:
If we divide 2100 by 377, we get 5 and a remainder of 215.
Use 5 as the next digit of our solution. 
Result so far: 122015.705
If we subtract 1885 from 2100, we get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

On to step 12:
377 goes into 2150 5 times with a remainder of 265.
Record the quotient 5 as the next digit in the result. 
Result so far: 122015.7055
If we take 1885 away from 2150, we end up with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

The quotient of the division is 122015.7055, and the remainder is 0.00265.